Arrow-shaped slide fastener



Oct. 30, 1951 P. NATZLER ETAL ARROW-SHAPED SLIDE FASTENER Filed Aug. 16, 1947 IN VEN TORS.

PAUL NATZLER a 2:35am I. Pawns Patented Oct. 30, 1951 2,573,046 ARROW-SHAPED SLIDE FASTENE-R Paul Natzler, Jackson Heights, N. Y, and Robert J l I I. 'Prupis, Irvington, N. J assignors to Conmar Products Corporation, Newark; N. J.,"'a"c0rporation-of New Jersey Applicationllugust 1c, 1947, Serial n fleao s This invention relates to slide fasteners, and more" particularly to a slide fastener so shaped asto'" facilitate the assembly of the'slider and stringers in proper relative direction.

" Altli'ough 'slide fasteners for many purposes are'sold'completely assembled with the slider on th stringers retained againstremoval'b'y appropriate end stops, there .are other purposes for which the stringers and the sliders are soldsep- ,Qwhich' the slider and the end stops are added.

In other cases, the stringers are sold in the form ,of continuous chain either for export, or to dealers who inturn sever the continuouschain into separate stringers and add the s'lidersand end stops in accordance with the needs'of the'cus- ,tomer; for somecustomers may require a plain 'sli'der," and'jothers, locking sliders "of different :1 types; some may require pulls of difierent size or,"type; and some may require end stops of differ ntkinds. 1., v an these case's, it. isimportant to" assemble the slider on the j'stringers in proper direction. The customefmust examine the stringer closely [to 'makesure that he is not sewing it into the garment in improper direction," or adding the slider in improper direction.

A lprimary object of the'present invention is to overcome this difliculty, and'to give the stringers a shape which clearly indicates the proper direction in which itis to be used, or in which theslider is to be added.

Another object of the invention is .to inhibit ravelling of the threads of the tape at the severed ends (ravel is here used in the same sense as unravel or fray). For this purpose, it is already known to sever the continuous slide ijastener chain into stringers by means of a pink-- ing'cut, that is, a cutconsisting of a large number of tiny serrations. In accordance with the present invention, the ends of the tape are cut on lines which slope, or which for most of their lengthslope r are on a bias. 7

In accordance with still another object of the invention, the head end of the stringers is so out as to mate with the tail end of the stringers, so that the chain can be severed into stringers without scrap or Waste therebetween.

stringers are separated by a out such as that TClaims. (Cl.24205.16)

To accomplish the foregoing objects and others which will hereinafter'appear,'the present invention resides'in the fastener elements "and method steps, and their relation one to the'other, as are hereinafterinore particularly pointed out in the following specification. Thespecification is accompanied by'a drawing, in which:

Fig. 1 shows a fragment of continuous fastener chain or stringers;'

Fig. 2 illustratesa'single stringer so severed from' the chain as to embody features of the present invention; I

Figs. 3, 4 and 5 show modifications; and.

Fig. 6 shows a slider disposed in proper direction relative to thestringers prior to addition of the slider to the stringers.

Referring to the drawing, and more particularly to Fig. 1, a continuous slide fastener chain is shown, this comprising tapes l2 and I4 having the customary beaded edges I6 on which interlockable fastener elements, I8 are secured. The fastener elements are in groups of predetermined length, and' are separated by so-called gap spaces 20 between the groups of fastener elements. To form individual stringers, the chainis severedacross the gap spaces 20, and heretofore this severance has been either a straight line, ora serrated or so-called pink cut.

In accordance with the present invention, the

shown by a dotted line at 22. The resulting stringers are shown in Fig. 2, and it will be seen that the stringers have been given a somewhat arrow-shaped configuration, that is, the upper end 24 of the stringers has a somewhat arrowhead shape, while the lower end 26 has a somewhat arrow-tail shape. This shape is significant because it serves to indicate the proper direction in which the. slider is to be added to the stringers. One form of slider is shown at -28 in Fig. 6, and this slider should face in the direction shown in Fig. 6 when applied to the stringers shown in Fig. 2;

It will be understood that the fastener elements 48 are assumed to be of the conventional or unsymmetrical type, and from inspection of the various figures of the drawing, it will be seen that the elements are so disposed as to have the projection on the head pointed upwardly. Thus, in the present drawing the element projections, the

arrow-shaped stringers, and the slider, are all disposed in upright position, and that is the relative position in which they should be assembled. By making the stringers arrow-shaped as here 3 shown, it becomes necessary for a person assembling thefastener (or sewing it into a garment even before assembly) to examine the relatively minute fastener elements to determine the proper direction in which it is to be used.

It will be noted that the lines of severance are sloping or' biased lines which prevent or inhibit ravelling of the threads of the tapes. It will'also be noted that the head end 24 is so shaped as to mate with the tail end 26, so that a single cut across the chain is adequate to separate the same into stringers without scrap or waste between stringers.

Of course, the particular shape shown in Figs.

1 and 2, is only one of many which may be employed, in the same way andfor the same purpose. Thus, referring to Fig. 3, the head ends 3!) are convex, much as in Fig. 2, but with each tape separately pointed instead of the pair of tapes being pointed in combination. Similarly, the tail ends 32 are separately recessed or feathered, instead of the two tapes being recessed in combihation.

It will be understood that straight lines may be used in lieu of curved lines, in which case the stringers shown in Fig. 2 will have a single point and a single tail, while the stringers shown in Fig. 3 will have two points and two tails.

Moreover, the cuts may, if desired, be made up of a number of lines, and a portion of the cut may be horizontal instead of biased. Such an arrangement is shown in Fig. 4, in which the head ends are made upof transverse lines 34 and sloping lines 36. The tail ends preferably mate with the head ends, and are made up of transverse lines 38 and sloping lines 40. v

In Fig. 5- the cuts are also made up of trans verse and sloping lines, but with the sloping lines disposed between the transverse lines. More specifically, the head ends are made up of sloping lines 42 and transverse lines, while the tan ends are made up of sloping lines 46 and transverse lines 48. Here again the ends preferably mate, but it may be worth mentioning that although desirable, it is not essential that the ends mate, the only difference then being that the severing knife will be differently shaped and its action will be to punch away some of the material of the chain, instead of merely to sever it.

It is believed that the nature, method of nianufactu're, and method of use of our improved slide fastener, as well as the advantages thereof, will be apparent from the foregoing detailed description. Itwill also be apparent that while we have shown our invention in several preferred forms,

changes may be made without departing from the spirit of the invention as sought to be defined in the following claims.

We claim:

1. A slide fastener comprising tapes with interlocl'iable fastener elements along their adjacent ed es, one end of said tapes being cut on lines which have'an arrowhead significance, and

the other end of said tapes "being cut on lines which have an arrow ta'il significance, said arrow shape serving to' indicate the proper direction in which the slider is to be added to the stringers.

2. A- slide fastener comprising tapes with interlockable fastener elements along their adjacent edges, one end of said tapesbeing cut on lines which have an arrowhead significance, and

the other end of said tapes being cut on lines which have an arrow-tail significance, the head end being so shaped as to mate with the tail end to avoid waste of tape between stringers when severing a continuous chain into separate stringers, and said arrow shape servingto indicate the proper direction in which the slider is to be added to the stringers.

3. A slide fastener comprising tapes with interlockable fastener elements along their adjacent edges, one end of said tapes being cut on sloping lines which prevent ravelling and which have an arrowhead significance, and the other end of said tapesb'eing cut on sloping lines which prevent ravelling and which have an arrow-tail significance, said arrow shape serving to indicate the proper direction in which the slider is to be added to the stringers.

4. A slide fastener comprising tapes with interlockable fastener elements along their adjacent edges, one end of said tapes being cut on sloping lines which prevent ravelling and which have an arrowhead significance, and the other end of said tapes being cut on sloping lines which prevent ravellin'g and which have an arrow-tail significance, the head end being so shaped as to mate with the tail end to avoid waste of tape between stringers when severing a continuous chain into separate stringers, and said arrow shape serving to indicate the proper direction in which the slider is to be added to the stringers.

5. The method of severing continuous slide fastener chain into individual lengths, which includes cutting across the chain between stringers with a out which gives one end of the stringer a shape having an arrowhead significance, and the opposite end an arrow-tail significance, the arrow shape serving to indicate the proper direction in which the slider is to be added to the stringers.

6. The method of severing continuous slide fastener chain into individual lengths, which includes cutting across the chain between stringers with a out which gives one end of the stringer a shape having an arrowhead significance, and the mating opposite end an arrow-tail significanoe, said ends being so severed as to inhibit 'raveinng of the tape, the arrow shape serving tail significance, said ends being severed without waste therebetween and being so severed as to inhibit ravelling of the tape, the arrow shape serving to indicate the proper direction in which the slider is to be added to the stringers.

PAUL NA'IZLER. 7 ROBERT I. PRU'PIS.

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